Friction shock-absorbing mechanism



May 29, 1923. 1,456,998 J. F. O'CONNOR FRICTION SHOCK ABSORBING MEGHANISM Filed Sent. 8, 1921 Patented May 29, 1923.

JOHN" FL o'connoa, ontoHioAGo, ILLINoIs, ASSIGN'OR TO WILLIAM o'HAzY, NEW YORK. I

time a FRICTION SHOCK-ABSORBING MECHANISM.

Application filed September 8,- 1921. Serial No. 499,202.

To 'dll 'wlzom "it may concern:

Be it knownthat I, J OHN F. OCONNOR,\ citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvementin Friction Shock-Absorbing Mechanisms, of which the following is a full, clear, concise, and exact description, reference being bad to the accompanying drawings,'-forming apart of this specification. i

i This invention relates-to improvements in friction shock absorbing mechanisms.

One object, of the invention is to provide a railroad 'draft gearof the friction'type having a large frictional area;

Other objects of the invention will more clearlyappear from the description of one embodiment of'the invention hereinafter following, r

Inthe drawing forniing'ja part of this specification, Figure 1 is ahori'zontal section of a draft rlgging embodying my invention'. Figure 2 is a cross-section taken on line 2 '2 of Figure 1. Figure: 3'is'faqcrosssection taken on line 3- 3 of Fi ure 1. i Figure 4]: is a perspective view of one of the friction blocks. v i

Referring to the drawing, the numerals lO 1O indicateithe' 'd'raft sills, or other similar'members of a railway car to which the draft rigging is applied. 11 11 are front stops secured thereto, and l2- l2, the rear stops. The butt of a drawbar 1s 'shown'at 13, suitably slotted for the passage of the key 14 which extends at its ends thru slots 15 formed in the draft members 10 and the front stops 11, the said slots being suitably elongated to'permit the longitudinal movement'of said keyl'therein. The key 14 has a slidable slotted connection as indicated at 16 with the draft yoke 17. A shell 18. is mounted within the yoke pocket, the yoke and. shell being suitably supported by the tieplate 19whichis appropriately secured, as'for instance by the bolts 20, to thedraft sills. A front follower is shown at 21 and engages the forward face of thepl unger 22, which'in' normal position of the parts protrudes from the forward open" end of'the shellilS. Intermediate: the plunger 22 and the springs"23,which' are mounted in the rearwardportion' of the shell 18, is 'a pluralityof friction blocks 24, each an'oblique l)arall'elogram in horizontal section and'rel- H. MINER, or

atively arranged in a staggered for zig-zag formation. The sides 2525 ofeachof said friction blocks are substantially transverse to the axis of the shell and the ends 2626 en:- ga-ge adjacent parallel friction faces 27-27 oppositely formed on the "interior of the shell. Each of the opposite parallel friction faces 27 -27 for av friction b1ockare angular to the friction faces ada'ptedto en: gage the 'endsof its adjacent friction block In the particular embodiment of chainvention illustrated in; the, drawing, four friction blocks 24ersshown, the forward one being indicated 'at- 28, the rearwardat 29, the frontintermediate atBO, andthe rear intermediate at 31. V Eachof-said blocks and the shell in the vicinity of the friction faces 27 are suitably commas-indicated at The rear friction block 291rearwarolly engages the front face of aninternal follower 33. The forward endof' the spring-23 is seated between the rear internal face=3f of the shell and the rear face 3501f the internal follower- 33. As indicated at 36 invFigure 30f the drawing, the internal follower .is provided with aslot for the reception-ofthe spring 23 and-the shell-'is'open as at- 37=-37 to perr'nitthe insertionof parts ont-he assembling of the gear, Onr'ea'rward movement of; the drawlbar, the front followerv 121 moves the plunger-.22 rearward-1y, whichin 1 turn forces the-front friction block 28 rearwardly and laterally-along the-adjacent guiding friction faces 127;, During this movement the front friction blocka28 will be in sliding frictionalengagementwith the front face of the front intermediate friction block 30 which will,iunder the thrust ofthe front friction block; 28,gmove rearwardly in friotion'al engagement with the friction faces of-the shell 'adjacentits ends and laterally in a direction, opposite to the lateral movement of the front friction block 28. "The rear 1 intermediateY 'frictio11 block 31 will, thru theinnoujlsegivenit by 5 the front intermediate friction block30, move in parallelism with the front-friction block 28 and in turn the rear'friction block 29 will move in parallelism' with the front intermediate friction block 30. The move 4 ments of the friction blocks describe'dwill all beresisted by the spring 23thru" its pressure against the internal-- follower against'whichthe rearfriction block 29 mm frictionally'engage; Upon fullcompressing movement of the gear the shoulders 38, 39

and 40, upon the rear face of the plunger 22 will engage respectively against the limiting stop faces 41, 42 and 43, provided within the shell. In preferable arrangement the front follower 21 will engage the front end 44 of the shell simultaneously with the engagement of the plunger against the limiting stops. On forward movement of the drawbar the shell is drawn forwardly by means of the yoke, the action of the parts within the shell being similar to that occurring upon the rearward movement of the drawbar hereinbefore described. It will be observed that in the action of the friction blocks, by reason of their zig-zag or staggered arrange ment, alternate blocks will move in the same direction laterally and longitudinally, and that the odd numbered friction blocks, as for instance the front block 28 and the rear intermediate block 31 will move laterally in one direction, while the even numbered friction blocks, as for instance the front intermediate block '30 and the rear block 29, will move laterally in the opposite direction.

I have herein shown and described what I now consider the preferred manner of carrying out the invention, but the same is merely illustrative and I contemplate all changes andmodifications that come within the scope of the claims appended hereto.

I claim:

1. In a friction shock absorbing mechanism for railway cars, the combination with a shell having internal friction faces; of pressure transmitting means; a spring resistance; and transversely arranged friction elements within the shell, said elements being interposed between said means and said spring resistance, and each of said elements being provided at opposite ends with friction faces adapted to co-act with the friction faces of said shell.

2. In a friction shock absorbing mechanism for railway cars, the combination with a shell having a plunger and a spring therein; of a series of blocks interposed between the spring and the plunger, each of said blocks having opposite pairs of parallel friction faces, one air of said faces being inclined with re ere-nee to the longitudinal axis of the gear, said shell being provided with internal friction faces, said friction faces being arranged in sets, each set having parallel contacts with alternate friction blocks, the said two sets of friction faces being oblique to each other.

3. In a friction shock absorbing mechanism for railway cars, the combination with a shell; of a series of friction blocks; a plunger at one end of said blocks; and a spring at the other end thereof, the said blocks engaging at their sides, one with the other, the shell having friction faces engaging the ends of-each of said blocks, the

friction faces for alternate blocks of the series being parallel to each other, and the adjacent friction faces of said shell being disposed angularly to each other.

4. In a friction shock absorbing mechanism for railway cars, the combination with a shell: of a plunger and spring members within the shell; and a plurality of friction blocks interposed between the plunger and spring members, the shell being provided with friction faces for the ends of said blocks, said blocks having opposite pairs of parallel friction faces, said pairs of faces disposed obliquely with reference to each other, said blocks being arranged in alternate staggered relation, whereby each friction block has a lateral movement opposite to the lateral movement of its adjacent friction block.

5. In a friction shock absorbing mechanism for railway cars, the combination with a shell having internal friction faces; of pressure transmitting means; a spring resistance; and transversely arranged friction elements within the shell, said elements being interposed between said means and said.

spring resistance, and each of said elements being provided at opposite ends with parallel friction faces, said faces being inclined with reference to the longitudinal axis of said shell and adapted to co-act with the friction faces of said shell.

- 6. In a friction shock absorbing mechanism, the combination with a frictionshell provided with pairs of oppositely disposed parallel internal faces, said faces being inclined with reference to the longitudinal axis of said shell, and the faces of adjacent pairs being reversely inclined; of pressure transmitting means; a spring resistance; and a plurality of friction elements interposed between said means and said spring resistance, said elements being transversely disposed within the shell and provided with friction faces adapted to co-operate with the friction faces of said shell.

7 In a friction shock absorbing mechanism, the combination with a friction shell provided with internal friction faces; of a pressure transmitting member; a spring resistance; and a series of friction blocks interposed between said spring resistance and said member, and arranged transversely within said shell, each of said blocks being provided with parallel friction faces at opposite ends, adapted to co -act with said friction faces of the shell, said end faces being arranged at an angle to the longitudinal axis of the shell, and the end faces of adjacent blocks of said series'being reversely inclined.

8. In a friction shock absorbing mechanism; the combination with a friction shell having opposite internal walls thereof provided with friction faces, the friction faces of each of said opposite walls being arranged in series with adjacent faces of said series blocks relative to each other transversely of disposed at an angle to each other; of a. the shell, is efi'ectedf a series of friction blocks arranged trans- In witness that I claim the foregoing I versely of the shell, said blocks being 'prohave hereunto subscribed my name this 26th 5 vided with friction faces at their ends, oo day of Aug. 1921. a

operating with the friction faces of said shell; and pressure transmitting means act- JOHN QCONNQR; ing to move the said series of blocks longi Witnesses: I tudinally of the shell and along the friction CARRIE GAILING,

10 faces thereof, whereby movement of said I UNA C. PERIN. 

